Gardening is not like fashion in terms of new trends every few months, but thanks to the Internet things are still changing.

Smart gardening that is made with the help of Internet-connected and programmable devices has started to catch up.

At the recent "Spoga + Java" trade fair in Cologne, Germany, where manufacturers introduced their new products for next season, it was clear that the industry was increasingly focused on digitization.

There was almost no company that did not have a form of hardware connected to the Internet if there were no complete sets.

"Smart gardening is about being able to take care of itself," explains Anna Hackstein, managing director of the German Association for Horticulture. Robots can now roll grass or automatic irrigation systems can irrigate the garden when required as a result of programming or soil sensors. "If needed, you can give remote commands via an application on your smartphone," Hackstein adds.

Of course some gardeners may wonder about the utility of all this technique, since the significance of gardening is to get out of the house and make the hands get hot.

However, smart devices can help do things that amateur gardeners may not like to do such as hard, weekly or even daily tasks such as irrigation and lawn mowing.

Hackstein spoke of significant growth in the sector.

"There is more and more low-level products," she said. However, private gardeners seem to be interested in a very small range of products for smart gardening.

Automatic pumps for water pools are common, while lawnmowers are the smartest selling product.